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[[Category:Projects]]
[[Category:Projects]]
I have a board with an AMD Geode CPU for some light retrocomputing development. This page details it and whatever I get up to with it.
Since November 2021 I've been working on a video production where I fix a board with an AMD Geode CPU. This page documents my notes about the board


See [[AMD Geode/Troubleshooting]] for details on the troubleshooting process.
See [[Geode Repair/Troubleshooting]] for details on the troubleshooting process.


See [[AMD Geode/Video 1]] for details on the first video production.
See [[Geode Repair/Video]] for details on the video production.


See [[AMD Geode/Video 2]] for details on the second video production.
TODO: Include some photos of the board.
 
See [[AMD Geode/Video 3]] for details on the third video production.


== Motivation ==
== Motivation ==
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At least, until I saw an offer on eBay: a used [https://buy.advantech.net.au/Boards-Cards/Embedded-Single-Board-Computers-3-5-Single-Board-Computers-By-Processor-AMD-G-Series-Processor/model-PCM-9375F-J0A3.htm?country=Australia&token=637787139068984110&f=AUS Advantech PCM-9375F] for only $50 AUD, which is over $400 less than new.
At least, until I saw an offer on eBay: a used [https://buy.advantech.net.au/Boards-Cards/Embedded-Single-Board-Computers-3-5-Single-Board-Computers-By-Processor-AMD-G-Series-Processor/model-PCM-9375F-J0A3.htm?country=Australia&token=637787139068984110&f=AUS Advantech PCM-9375F] for only $50 AUD, which is over $400 less than new.


Why such a huge discount? Video output is broken. Which means you can't really do much with this machine. This at minimum would let me run by Internet-connected DOS bot and talk to DOS over a serial port.
Why such a huge discount? Video output is broken. Which means you can't really do much with this machine.
 
I've also not had an x86 board with GPIO before, so that seems like something fun to play with.


I bought it on November 7 2021 and received it on November 12 2021.
I bought it on Nov 07 2021 and received it on Nov 12.


== Board specifications ==
== Board specifications ==
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* CompactFlash storage
* CompactFlash storage
* 3 RS-232 serial interfaces (only the main serial interface is given a port)
* 3 RS-232 serial interfaces (only the main serial interface is given a port)
* 8 GPIO pins (you don't see x86 boards with GPIO often)
* 8 GPIO pins
*No [[nopl]] instruction support (not documented)
 
This at minimum would let me run by Internet-connected DOS bot and talk to DOS over a serial port.
 
I've also not had an x86 board with GPIO before, so that seems like something fun to play with.


Note that the IDE connector on the board is 2.0mm pitch, not the standard 2.54mm pitch most IDE cables use.
Note that the IDE connector on the board is 2.0mm pitch, not the standard 2.54mm pitch most IDE cables use.


TODO: Add photos
TODO: Look at board again and validate and clarify these specifications.


== Setup ==
== Setup ==
For power I use a USB to Molex fan adapter. These come with the 5V USB connected to the 12V pins on the Molex connector in order to run a 12V fan at a lower voltage. With a little effort you can pry them out and put them in the 5V pins on the connector.
TODO: rename this maybe?
 
- USB power
 
- CompactFlash


For storage I'm using a CompactFlash card. Nothing fancy.
- Null Modem Cable


For serial I'm using a DB9 null modem cable with partial handshaking. I tried buying one from eBay first but instead got a straight through cable instead. See my [[serial ports]] page for more information.
- move troubleshooting to its own page
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